fix new-app: retry build trigger, clean up temp nginx conf, add remove-app script

scripts/new-app.sh

@@ -276,11 +276,17 @@ git push
 # --- Trigger initial build ---
 
 echo "==> Triggering initial build for $APP..."
-TRIGGER_CODE=$(curl -s -o /dev/null -w "%{http_code}" \
-    -X POST "$GITEA_URL/api/v1/repos/$GITEA_ORG/$APP/contents/.deploy-trigger" \
-    -H "Authorization: token $GITEA_TOKEN" \
-    -H "Content-Type: application/json" \
-    -d "{\"content\": \"$(echo -n "initial deploy" | base64)\", \"message\": \"trigger initial build\"}")
+# Wait for template repo to be ready (Gitea generates content asynchronously)
+for i in $(seq 1 60); do
+    TRIGGER_CODE=$(curl -s -o /dev/null -w "%{http_code}" \
+        -X POST "$GITEA_URL/api/v1/repos/$GITEA_ORG/$APP/contents/.deploy-trigger" \
+        -H "Authorization: token $GITEA_TOKEN" \
+        -H "Content-Type: application/json" \
+        -d "{\"content\": \"$(echo -n "initial deploy" | base64)\", \"message\": \"trigger initial build\"}")
+    [ "$TRIGGER_CODE" != "404" ] && break
+    echo "  Waiting for repo to be ready..."
+    sleep 2
+done
 
 if [ "$TRIGGER_CODE" = "201" ]; then
     echo "  Build triggered."